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- A hollowed-out chamber in the earth or in the side of a cliff or hill.
Translated in 42 languages
- A large natural hole in stone (on a mountainside, in a cliff etc)
Translated in 39 languages
[Subject: Geology, Meteorology, Hydrology]
Translated in 4 languages
Translated in 2 languages
[Subject: Generalities]
Translated by: FARHAD PEZESHKI
Translated by: GUEST USER